Multiple unit treadle door control apparatus



Aug. 20, 1935. H. RowNTRl-:E 2,011,652

MULTIPLE UNIT TREADLE DOOR CONTROL APPARATUS Filed Sept. 25, 1934 Barlruzrs kr y, 5 aofk l .4 i *5 g l [9 J 34, A L,... 5o

l Z 5 Engref 'af Device INVENTOR ATTORNEY6 Paie-aree aug. 2o, 19354 anni ,MULTIPLE UNrr frenante Doon? ooN'rRoL V Aifrann'ros u `Harold Rowntree, Winterhaven, Fla., assigner to A National Pneumatic Company, New York, N. Y.,

a corporation of West Virginia V Application septemberas, 1934, serial No. 745,572

' 4 claims. (o1. 268-34) inventionV relates ingeneral to improvements' in power operated doors which are controlled by means of a multiple unitrtreadle.V4

The basic object of this invention is toprovide a power operated door system'in which the power mechanism is controlled by a plurality of treadles arranged Aso that a person intending to pass through the doors will unconsciously set the parts in motion so that by the time he reaches the doors theywill be open, and having passed through them l'they will immediately close. The many, objects of this invention which are successfully secured by means of the apparatus herein described will be apparent as the descrip'- tion'proceeds.

`This invention resides substantially in the combination,` construction,- arrangement and relative location of parts, all as will be set forth below.

In the drawing', The single figure is aV diagrammatic illustration `of the apparatusasassociated to providethis invention. At-*the present time it is commonv practice to provide power actuated-doors Yfor buildings, ofcesyrailwayfstations, Vehicles and thelike. In

'the usual forros of suohequipment as `now' employed, the apparatus being arranged for opera- -v tion Vby persons approaching the doors from either side, there is an undesirably llong period during which the doors remain' open after the person has passed therethrough. 'I his is obviously a disad- Vantage from -many viewpoints and particularly in the case where the doorsclose off a'heated the doors they may-begin to close, thereby ina-` terially reducing` the time period during which the doors-are open'. l v l This object is accomplished in accordance with the presentinvention by meansof the mechanism which will now be described. f

The do'ors'are diagrammatically illustrated at l,

randas `illustrated are of the'double-leaf folding typ'e!V These doors are secured to vvertical door shafts l at opposite sides of `the-doorway ywhich arev rotatedV by means of. any suitable form of engine, `causing the doors to swing open and the leaved-sections to fold back-upon theother sec` tions. This type of door is of course Awellknown in the art."4 For the purpose of illustrating one feature ofV this invention, it will be assumed that the door sections swing to the right (the gure For this reabeinga diagrammatic plan View). sonV the central treadle 2 is positioned so that it is more exposed to the right ofthe doors than to the left, so as to allow for the fact that the doors will not begin to close so soon after the person has passed through chemin moving from the left to the right as to be likely to strike the personbefore he has moved out of their range. Obviously, when a person is moving from the right to left the doors may begin to close more quickly since theyare following him and `not moving towards him in the case of reverse direction of travel of the person. Contiguous to, and lying at each side of the treadle 2, are the longer treadles 3 and ll.

The treadles may be of anyone of a large number of formsl of treadle construction known in the art, and are preferably, but not necessarily, of

ltheelectric type. The apparatus as illustrated in the drawing is of the electric treadle type n which when the treadle is stepped upon an electric switch `in a` control circuit is closed, and held closed'until the pressureis removed from the treadle. Thus the three treadles 2, 3 `and 4' are arranged-in line in the passageway to the door at both sides thereof, as illustrated in the drawing. The switches operated by these treadlesiare illustratedin the drawing in the form of two contacts for each treadle as clearly shown. Rotatably supported adjacent each end of the treadlepath of the doors are the barriers 5- 5 and 6--6 which may be in the form of arms, gates, or the like pivoted so as rto swing on a vertical axis. These barriers are provided with extensions as shown, each of which cooperates with a pair of fixed contacts; The showing in the drawing is merely dia-i grammatic since anyksuitable Vform of switch may be employed for each section which will be closed when the barrier begins to move towards the doors and willV remain closed until the `barriers have swung back, almost to the closed position illustrated. A relay is shown comprising a solenoid winding 'l and a pair of contact discs 8` and 9 operated thereby. One terminalrof the winding is groundedand the other terminal is connected by a wire lll to one contact of each of the -barrier switches. Wire IG is connected by wire l I to one of the fixed contacts controlled` by the contact disc 8,. The corresponding contact is connected by wire l2 to one of the contacts of the switch operated by treadle 3. Ihe other contact of this switch is connected by wire I8 to one contact of of eachfcf the barrierr switchesjoperated bythe barriers 64b-6.' Wire I8 is also connected to the 'othercontact of the ybarrier switches operated by Y 'the'ba'rriers 5 byv'means rof Wire M which also Wire' I8 is connected by Wire 23 to theotherY cons 'vi-2,011,552 switch 'of treadle [and to'one'contact oft-hef' r'switch oftreadle 4. VWire Iii Vis also connected to one ofthe 'contacts Y connectsftoioneiof the contacts'controlled byl the,A contactfdiscf.: vAt the other end of the apparatus 1()v tact'ofeach of the barrier switches controlled by I the barriers 6,-5, and to oneof the contacts conf.. r

nected by the wire lI 5 which -inl turn is connected by the wire ll tofone terminalfo'f the `winding'of fr trolled by contact disc 2l. "The otherixed cone .15j tactsjcontrolled bythe discs 9 and-2l are con-Y' 9 the magnet valve i6, andfwhich wire isfalsofcon-r 'non ending 'lebendig nected to the other contact ofthe yswitch operated dises Zgand 2! are operat terminal by Wire lite magnetjvalve I 6L' eventhough theperson I has vnowleft treadle 3V the doors Willbe held open because the switch of ytreadle 2 is closed.

They person having left treadle il;r the holding circuit to the Windingf'is brokenjand hence the circuit to the magnet V'Valve through Wire l5 is broken. Asfsoon as' thev person leaves treadle v2 the circuittofthe'magnetvalve is broken so that the enginebegins to close the doors. -As pointedy out above; thetreadle 2 projects somewhat furtherb'eyond' theright sideof the vdoors than it .does thevleft, it having lbeen lassumed thatl the doors'open Ato th'ig'ht. TheV purpose of this is to permitlthe person to fully move lout of the range of the doorsbefore they' begin to' close.

ZfThe person leaving .'treadle Z'fand stepping on 1treadle14 doeslnot complete any` circuits since when thejbarriers if are displaced 'byJ a person ..by-treadle 2. The othercontactof the Winding :in the magnet valve is, grounded. The;contactf 4byfh? gfolul'ided, 5015i onnecte'd at its other f the eeieeie eieeeh 1 ef' meeerrierlewieehes "@ereredv by' the .barriere ofv the contacts controlled b A n 2B. j .Tneeprresponding Contact, iS connected by SNr'eLZA 'to"the'otherfcontact c ifytheV switch oper- .atedflbyfbarrierfdf'The lWire IA is connectedV ftothefpositive sider of acurrentsource, the other r terminal. of which isgrounded.

V *f Y fee of wellknownforms. yBasically it consists of a valvewhich.normalli; assumes one position, and

` The magnet valve may vbeof any'of a number which vWhenv the solenoid VWinding thereof .is enyergized, vassuinefs *another pt s'itiron.` This valve in norrial positionfsupplies fluid-pressure tothe enand maintainfthe when ihfej'windme t 'leeedl In. its ether. .position 1S energized it supplies air te Ysuitable*typeY f id'winding l'. "The Y ergization or this unece the eelreep'ending' eenteets., 21,11 the vinearitiir'ie the 'person steppednonvthe treadle' weee ground.; 'Ilr'ssupp1esaholding-eircuitierfthe 4sWitc contact disc Wire YI-l, and-solenoidwindingIT to r wading 1.4.1reeeeereeonor @earner-snelle i .also srip1c lie`sy current from` Wire M through contact f f es;

Y.. fgtee e@ elinev Y@Treilli-fer dingflm V1n nslthe Cltuitto themlag..

je, ,peretienseff-jtne magnet d. ereeeureftethe .deereneine se 'A ne steps on'y @reagire z its swiped-noiose@ and `v@"urrent is then directly sunpliedfirorn Wire l5 -.Currentthenfiewe fremY ginewhich'roper'ates thefdoors' lso as to close them l ee peeitienjte in: q

' at bothA sides oi, the do'on;A yswitchesy operated Y by c said treadlesjcircuit including-said switchesfand said magnet valve; and barrier switches .operated 'the 'decisr begin-- te enen. Biathe tmethe" 1. In a bination comprising a pair of doors atreadle vmovingto the rightl the corresponding switches are'notclosed. VIt Will not be necessary:jtojdescriberthe operation of the apparatusiby aperson approaching the doors from the right since. a Lsimilar sequencelof operations occursr whensolenoid I9 is energized.

From the above description it will be apparent that 'this invention residesincertain principles of con'structionV and operation Whichmaybe embodied in other physicalforms without departure from the scopeoffthisinvention Iido not, there.-V yfore,rdesire tobeY strictly limited to the"disclosure as given for purposes Vof illustration,'buty rather to thescope of VtheAfrippended claims. y *n What seek vto secure by United Statesf'lletters Patent isi j vrnotor operated door system, the comsupported Aunderlthe doors,A at least one v treadle Y ffsupported vin v.the door passageway adjacent the enolsfoijthefirst `mentioned treadle, each of said treadles having'mavswitchrwhich is "closed when vadjacent` the ends of the terminalY treadles,`

placement 0i either; barrier onlytwarde. the doers and theV eleeine; Ofeny treedle Switches-Will the treedle ie ,stepped upon-barriere leupnorted,

4' vswitches controlled by-,said barriers; armotor mag.-

f .net valvaand circuit means including all o fvsaid ewiteeee endeeiel magnet velvelwherebyithe Y011e- 4 cause the energizaticn ofthemaglet valve, the

magnetvalve being deenergized when a person Y Passing; ihre-,ugh the doors .in .either direction leaves theoentral treadle. f

Y 2. lin a motor 'operated doorsysteml ythecornbiiiletierrC..eIiiinfieles, a motor: control valve, a plu-l relityef indenendenttreadles ingthe passageway ,only by, ajpersonapproaching the AdcorsiA from 'v eithervr side to.. initially fenergizegthe magnet valve,Y the magnet ,valve being maintained enerf` gized by the closing of the treadleswitohes'until the person passes through the door.y Y 3. In a motor operated door vsysternthe combi- 1 nation comprising e .movable deor'.a central trea-l g dle supported thereunder,r atleast Yonejadditional treadle mounted Oneachside ofthe central treatreadle, v-switches controlled therebyand 'a magnetically operated motor controldevice internennetted with Yell 'ofsaidswitcheswhereby displacedle, vswitches controlled? by each; of; Said treadles, y a movable barrier supported 'at thegendof each ment of either barrier only. by vmovement towardsrv the door' and depression ofvthe adjacent treadle energizesthe magnet deviceto causethe doors to n fullyepen, .Said magnet device remaimng enery;

gized until a person passing through the doors leaves the central treadle.

4. In a motor operated door system the combination comprising a door, a plurality of separate treadles mounted in the passageway on either side of the door to form a continuous g-angway,

one of said treadles being mounted below the door,

ated by said barriers, an electro-magnetically operated motor Valve, and circuits including all of said switches and said magnet valve including relays whereby the displacement of either barrier only by movement towards the door energizes a corresponding relay to complete the circuit to the magnet valve and the closing of the treadlev switches maintains the circuit to the relay. Y

HAROLD' ROWN TREE. 

